ingersoll



(No Model.) I 2 sheets-sum 1. S. INGERSOLL.

I 0 BOOK DRILL.

1 No. 344,906. Patented July 6, 18-86.

//7 1/57 far (No Model.) 2 Sheets-Sheet 2.

S. INGERSQLL. v

ROOK DRILL.

No. 344,906. Patented July 6,1886.

lUnrrn rains Artur tries.

SIMON INGERSOLL, OF GLEN BROOK, CONNECTICUT, ASSIG-NOR TO POND, \VEST &SIMONS, OF PORT CHESTER, NEV YORK.

ROCK DRlLL.

EiPECIFICATION forming part of Letters Patent No. 3&4306, dated July 6,1886.

Application filed January 2, 1886. Serial No. 187,365.

To aZZ whom it may concern:

Be it known that I, SIMON INGERSOLL, a citizen of the United States,residing at Glenbrook, in the county of Fairfield and State ofConnecticut, have invented certain new and useful Improvements in HandRock-Drills; and I do hereby declare the following to be a full, clear,and exact description of the invention, such as will enable othersskilled in the art to which it appertains to make and use the same.

My invention has for its object to simplify and improve the constructionof this class of devices.

WVith these ends in view I have devised a novel construction, of whichthe following description, in connection with the accompanying drawings,is a specification, numbers being used to indicate the several parts ofthe device.

Figure 1 is a front elevation, the balancewheel being shown in section,likewise the at tachmcnt of one of the legs; Fig. 2, a transversesection on the line at m, looking down; Fig. 3, a detail View showingthe end of the crank, shaft, cam, &c., in elevation; Fig. 4, alongitudinal section of the entire machine on the line 3 g in Fig. 1,looking toward the left; and Fig. 5 is a detail sectional view of thecross-head and cap upon which the sprin rests, the plane of the sectionbeing the same as in Fig. 4.

1 indicates frame-work, preferably made of wood and having cross-pieces2.

3 indicates a metallic cross-piece secured to the frame-work andprovided with ears, to which the long log 4 is pivoted.

5 indicates metallic blocks bolted to the lower end of the frame-work,and provided with sockets G,'in which the short legs 7 are bolted, as isclearly shown in Fig. 1, said legs being adapted to turn when the boltis loosened, but having no endwise motion.

8 is a sliding carriage, which moves in ways 9 in the frame-work.

10 is the upper cross-piece of the carriage, which is engaged by ascrew, 11, supported in the upper cross-piece of the framework, as shownin Figs. 1 and 4. This screw is pro- 50 vided with a crank, 12, by whichthe carriage (No model.)

and the operating parts of the machine are raised and lowered when inuse.

13 is a shaft, which is journaled in the carriage, and is provided withcranks 14.

15 is the lower cross-piece of the carriage, k

and 16 the spindle which is supported in said cross-piece of thecarriage.

17 is a cross-head which rests upon collar 18 on the spindle, being heldin place by a removable collar, 19, which is placed above it and securedthere in any suitable manner. The ends 20 of the cross-head rest uponthe carriage and give additional stability to the parts when the machineis in use.

21 is a cap covering collar 19, (see Fig. 5,) and resting upon thecrosshead. This cap serves as abearing for thelower end of spring 22,the upper end of which bears against the upper cross-piece, 10, of thecarriage.

23 indicates flexible straps, the lower ends of which are attached tothe cross-head and the upper ends thereof to cranks 14 upon the shaft.

24 is the balance-wheel,which is loose upon the shaft, as indicated inFig. 1.

25 is a handle upon the balance-wheel, by which it is turned. Justinside the balancewheel is a ratchet, 26, which is rigidly se cured tothe shaft.

27 is a pawl, carried by an arm of the balance-wheel, and 28 a spring,the action of which is to keep said pawl in engagement with the ratchet.

29 is the drill,which may be of any suitable construction, and issecured to the spindle in the usual or any preferred manner.

The operation of this portion of my inven tion is as follows: The normalposition of the parts is shown in Figs. 1 and 4. When the balancewheelis turned, the engagement of pawl 27 with the ratchet carries the shaftwith IOO center, spring 22 will force the drill down violently, thusgiving a blow to the rock. When this instantaneous movement of thespindle and drill takes place, it will be apparent that the shaft andratchet must move away from the balance-wheel.

In practice I have found, owing to the flexibility of the straps, thatthe cranks are carried considerably past the dead-center at the bottom.Attheinstantthattheforwardmovement of the shaft and ratchet is checkedpawl 27 engages the ratchet again, and the move ment is repeated toraise the spindle and drill. It will thus be seen that during eachrotation of the balance-wheel the ratchet necessarily makes a completerevolution and more than half of another revolution. The exact gain thatthe ratchet makes upon the balance-wheel will ofcourse depend uponthedistance the drill moves before it strikes the rock. Spring 22 isnecessarily made powerful, so that a very heavy blow is instantlyimparted,and the shaft is as quickly engaged or picked up again by theengagement of the pawl with the ratchet. In practice it is of coursenecessary that the drill shall make a partial revolution after eachblow, so that no two blows of the drill will strike in the same place.This rotation of the drill I accomplish as follows: 30 is a cam at theouter end of the shaft that is opposite to the balance-wheel. 31 is arock-shaft journaled in brackets 32 upon the carriage. 33 is adownwardly-projecting arm,whichis rigidly secured to shaft 31. This armis held in engagement with the surface of cam 30 by spring 34, one endof which is attached to the lower end of said arm and the other end to apin, 35, upon the carriage. 36 is a set-screw for the adj ustment of arm33. 37 is an arm which projects upward from shaft 31, and 38 is a pawlrigidly secured to said arm or made part thereof. 39 is a groove inspindle 16, and i0 a ratchet having a spline which engages said groove,and through which rotary motion is imparted to the spindle. Ratchet 40rests upon the upper cross-piece of the carriage, and is held in placeby a bracket, 41, which is secured to said cross-piece. It will thus beseen that the spindle has free vertical movement through the ratchet,as'is of course necessary in giving each blow of the drill,and,furthermore, that when the ratchet is turned the spindle and drill arenecessarily carried with it. The mannerin which the spindle and drillare rotated is clearly shown in Figs. 2 and 3. It will be seen that eachrotation of cam 30 imparts a forward and backward movement to arm 33,which roe-ks arm 31, thus imparting a forward and backward movement topawl 38. At the instant said pawl is at its farthest position toward thefront it engages a tooth of the ratchet, and as the pawl moves forwardthe ratchet is carried with it, thus imparting a partial rotation to thespindle and drill. The

' ratchet is securely held against backward movement by pawls42, pivotedto the carriage, andheld in engagement with the ratchet by spring 43.

The important advantage of my improved construction is, that it enablesme to impart the partial rotation to the drill at the instant that it isstationary atits highest position-that is, just before spring 22 acts toforce itdown. I thus avoid the great strain upon the parts which isunavoidable when the rotary movement is imparted to the drill eitherwhile it is rising or falling. The exact instant at which the rotationis made depends, of course, upon the timing of the machine;but I am notaware of another construction that enables the rotary movement to begiven at any other time than while the drill is either rising orfalling. It will of course be understood that the details ofconstruction may be widely varied without departing from the spirit ofmy invention.

I claim 1. In a hand rock-drill, the combination, with thespindlc,cross-head, and spring 22, of a shaft having cranks 14, andflexible straps connecting saidcranks with the cross-head.

2. The spindle, cross-head, and spring, in combination with the shafthaving cranks 14, the ratchet 26 on said shaft, flexible strapsconnecting said cranks with the cross-head, and a loose balance-wheelhaving a pawl adapted to engage the ratchet, substantially as described.

3. The combination of the frame-work having vertical ways, and thecarriage adapted to slide in said ways, the vertical spindle free torotate and slide in said carriage, the shaft 13, having cranks 14, thecross-head, the flexible connections between the latter and said cranks,and the spring 22, for depressing said cross-head, substantially as setforth.

4. The shaft having cranks 14, and aratchet, and a balance-wheel loose011 said shaft, and provided with a pawl to engage said ratchet, incombination with the spindle, spring, and cross-head, and flexiblestraps connecting said cross-head with the cranks, whereby the crossheadis lifted, but when the dead-centerds passed is instantly forced down bythe spring, the ratchet leaving the balance-wheel until picked up againby the pawl.

5. In a rock-drill, the combination, with the spindle, cross -hcad, andspring, of a shaft having a ratchet and cranks, flexible strapsconnecting the cross-head with the cranks, and aloose balance-wheelhaving a handle, and a pawl adapted to engage the ratchet, whereby theratchet is carried until forced ahead by the spring, and then picked upagain by said pawl after having gained part of a revolution.

6. The frame-work having ways 9, the carriage adapted to slide therein,and the shaft, spindle, and cross-head upon said carriage, incombination with screw 11, journaled in the frame-work and held againstvertical move- ICO IIO

ment therein, and whose thread is adapted to engage the carriage,whereby the latter is raised or lowered.

7. The combination of the vertically-movable carriage, the verticalspindle free to rotate and slide therein, the spring surrounding saidspindle, the shaft 13, having cranks 14, the cross-head having ends 20for steadying the same, and the straps connecting said crosshead withsaid cranks, substantially as set forth.

8. The combination, with the shaft having cam 30, the carriage, and thespindle, of a ratchet, 4L0, upon the spindle, pawl 38, carried byrock-shaft, and an arm engaging cam 30, whereby the shaft is rocked andpawl 33 is caused to actuate the ratchet and spindle.

9. The combination of the vcrtically-1novable carriage, the spindle 16,having groove 39, the spring surrounding said shaft, the ratchet-Wheel40, engaging said groove, the bracket 41, for holding said ratchet inposition, a pawl, and a rock'shaft for actuating the lat-,

ter, and thereby intermittingly rotating said ratchet-wheel,substantially as set forth.

10. The spindle having groove 39, aratchet keyed to said spindle, butpermitting free vertieal movement thereof, and cam 30 on the shaft, incombination with a rock-shaft having an arm, 33, held against the cam bya spring, and an arm, 37, carrying a pawl, 38, which actuates theratchet.

11. The combination of the vertically-movable carriage having bracket41, the springactnated pawls 42, the vertical spindle having the groove39, the ratchet-wheel 40, engaging said groove, the rock-shaft 31,having arms 33 and 37, the pawl 38, the spring 34, and acam foroperating said arm 33, substantially as set forth. 7

In testimony whereof I affix my signature in presence of two witnesses.

SIMON INGERSOLL.

Witnesses:

A. M. Voosrnn, E. D. HOWELL.

